." >>> and now, we turn to the final sprint to the white house. president obama and mitt romney, trolling for votes in those key, battleground states. >> with just 12 days to go, the president is stopping in chicago today, to cast his ballot early. abc's tahman bradley has the latest on the mad dash by both campaigns. >> reporter: there's little in the way of rest for the presidential contenders. >> stay with me. and work with me. >> reporter: president obama, along with pop star, katy perry, showing her support in that dress, held a nighttime rally in battleground, nevada. the president stopped by nbc's "the tonight show," with jay leno. >> the debates are over. i assume you're glad. >> everything i was saying was true. but if you don't have the energy and the presentation that makes people kind of snap up and say, all right, i get it, then you're not doing your job. >> reporter: mr. obama spent the night aboard air force one, headed to swing state, florida, where he'll spend the day. mitt romney, who leads the president by one point, 49% to 48%, will focus exclusively on ohio today. yes